Saw clamp



Nov. 26, 1929. w. L. CARPENTER l 1,737,216

Filedl sept. 8, 1927 2 Sheets-Sheet l Nov. 26, 1929. w. CARPENTER 1,737,216

sAw CLAMP Filed sept. 8, 1927 2 sheets-sheet' 2 I gmntoz Car/wenz e1 Patented Nov. 26, 1929 UNITE er SAW CLAMP l Application led September This invention provides an auxiliary, or anti-back lash gate for band saw grinding machines, whereby to more securely hold the saw in its stop position during the process of grinding, to the end lthat a positive gate control is assured; the saw enabled to be ground in a less number of revolutions around the grinder, thus saving time and prolonging the life of the saw since frequent grinding 1 is not required; the necessity for repeated swaging overcome by reason of the uniform and even grinding which also results in uniform swaging; a smoother and faster cutting saw produced; the swaging and shaping of the saw made possible prior to the actual grinding of the saw which may be swaged during the process of first' time grinding Without the liability of pulling the saw back and producing irregular grinding, consequently saving time and grinding; and the danger of chopping off teeth eliminated through failure of the feeder to function. While the drawings illustrate a preferred embodiment of the invention, it is to be understood that in adapting the means to meet specific needs and requirements, the design maybe varied and such other changes in the minor details of construction may be resorted to Within the scope of the invention as claimed, without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawing hereto attached, in which,-

Figure 1 is a top plan view of a band saw clamp embodying the invention, showing the same in operative position.

Figure 2 is a front view of the parts illustrated in Figure 1. v

Figure 3 is a side view of the clamp showing the same in open position.

Figure l is a sectional view of the clampv showing it closed.

Corresponding and like parts are referred s, 1927. 'serial 116,218,190.

to in the following description anddesignated inthe several views of the vdrawing by like reference characters.

The inventionis adapted for usel in connection with any type or make of band saw grinding machine, it being observed that two clamps are provided and disposed one at each side of the main clamp, whereby to supplement the action thereof in securely. holding the saw during the grinding and swaging 5.5 thereof. A portion of the frame of a grinding machine is illustrated to provide a support for the clamp and the saw, and this frame comprises ahorizontal portion 1, and a vertical portion 2, the horizontal portion l forming a bed to receive the clamp and the vertical portion 2 providing a way and guide for the band saw 3 which is clamped thereagainst in any usual or preferred way by the ordinary holding means and by'two 65 clamps, such asillustrated in the accompanyingV drawings.v rIhe present clamp is mounted upon and secured to the horizontal or bed portion 1 of the grinder frame, and comprises a portion which is adapted to extend over the saw 3 and downwardly'in front thereof so as to clamp the saw between the way or guide portion 2 of the frame and the Y gripping-portion of the clamp. The base of the clamp comprises a plate 4 and spaced 75 uprights 5, the plate being provided with openings tovreceive bolts 6 for fastening the clamp to the frame of the grinder. The uprights 5 are elongated and extend in parallel relation. In the preferable construction the component parts of the base are of integral formation, being cast.

The movable partl of the clamp comprises a plate 7 whichis pivoted at one end to the base and which is provided at its opposite end with an oifstanding portion 8 disposed at a right angle to the plate 7. The plate 7V is of a width to iit snugly between the uprights 5 of the base, and is provided along opposite marginal edges with flanges 9 which no vare adapted to fit snugly between'the uprights 5. A bolt 10 passes through registering openings vformed in the uprights 5 and tion of the forward ends of the iianges v9y is cut away to clear'theswaged ends ,of the-saw v teeth, as indicated most clearly in Figure 4 of the drawings. A portion of the forward ends of the uprights 5 is similarly cut away for a like pur ose, as rindicated most clearly in Figure 3 o thedrewings- The een when c1an'ip ed, engages the forward ends of the uprights '5 and'fianges e The lstirring Portion' of the demi eemprises af jaw 11 from projects a flange 12 whiehiis arran ed in contact with the plate 7 tos which it isadlustably vconnected by means of .-a bolt 13,.V `The opening formed in thel plate -7 ,for vreceptionlof the bolt 13 is Yelongated to adnl'it yo f a limited movement of the jaw '11 towards and Vaway from'the saw 3. An V"open Vhelical spring 14 normally urges thefjaw lfl rearwardly,so asr to clamp `the saw .3'b'etweenfthesaid kjaw and the parts 9, v5, 4 and 1.l s pring`14 is mounted uponl the. inerendofa screw 15 which is threaded into 8.11. Qpe1'11g formedn the` o standing part 8 l ltlieplate 7. INuts 16; and 17 are mounted upon the screw '15, the nut 1,6 actingas a binderto securevthe screw in the required ad justed position, and the nutl?y serving as meansfor adjustingtlietension ofthe sprin 1.4.t'o causettiejaw 11 toclampthe saw 3 wit agreateror less pressure. Ijt is observed that by lmanipulatingthe, screw 15 and nut 16 the tension of the'spring 14 may be regulated wthentimevingthe 111113,17 A fatina .18 of woodisappliedto the vouterside of the jaw lLandpmvidee a yieldable gripping eilt-fete- Enrtions ofthe facing 18 are cut away to clear the :teeth ofthe Sew end; to concentrate the gtippingipressnrent determinate pointe- The arrangement is suchfas to enable the jaw Y11 to be adjusted toexert a variable pressnrenpon the. sew to prevent movement thereof or to adniitof adjustment of .the saw to bring the teeth in position for grinding and swaging.

when: the Inovable part of the clamp isv thrown upwardly, Aas indicated most clearly i inEigure Sioftheydrawings, itclears the saw andzdoes not ,in anymanner interfere with adjustment and manipulation thereof, as required. Vhenithe clampis closed the mova-` blepartextends overthe saw and downward;- lgmn .front thereof, :asindicated' most fclearly in Figure 4 of the drawings. In practice two' clamps, substantially as herein described, are provided, and are located upon opposite sides of the vusual clamp of the saw grinder, with the result that the saw is held between three clamps, and is maintained in proper position vfor grinding and swaging, and is prevented from undue movement which would tend to produce irregular grinding and prolong the operation of sharpening. Provision is had for securing the movable member of the clamp when in active or closed position, the same consisting of a screw y19 threaded' into one of the uprights 5, and adapted to engage the adjacent edge or side of the movable mem- Lberas .indicated most clearly in Figure 1 of the drawings.

Having thus described the invention, l claim: i Y

'1. Aiband saw 'cl'amp'comprising a base, a movable .member pivoted Jatgoneend toltfhe base, andhaving en odset portion at teoppo.-

siteend,r a j nw adapted to Coast, with .theta-,eef toI clamp ,the saw, means adjiistablyconnectrfA ing .thejaw to the movablernembeig a. screw screwand normally exerting a .prestsurenpqn' the zjaw to cause it to grip the sawk ing pressure.

'2. A band saw'clamp comprising lapbaseV including a 'plate andspaced .parallel up! rights,'a movable member `cemprising.a :pltze and flanges, the letter 'ensesiiieidie iipiishtje.

ofthe base, a pivot connetting the flangesgand iintighte, the `movable member hav-ins offset portion. -at its swinging, Vend, agjaw adented to cenet With the bese toieleinnlthe,

ammette ediiietebly @Omleiding theiewete.

the movable member, yascrew mpnnted- -4the oflfset portionof the `lnovable member, and a. Y

Sprinameiinted upon the eei'ew'eiid @dented to l,exert a yielding pressure upon the jaw.,V

A band Sew Clamp.'eoiniitieineelbesefe Pinte Pivoted tothe bese endfproietilieieif Wnfdly thereotend'having tdepend.ingParfton at ite outer forward end;7 a ii hating-a, flange. in tentant` wthfthefbottoinside ofthe forwardly projecting- ;pottion. of the, :said:

Pinte, said jaw eectiiiswithitfhe beeeitoinlaIn-P. the saw, a connection between the Harige-:and-

p'late admitting o-tthe jewhaving..a Limited inward and outward -nioiieinent ze screw mounted in the depending 'portion -tl.1..ef:l0e` fore mentioned plate, a Spring LIIQMIIQQQDQ screw yand adapted ,to exert .fa .PEeScSllIe M9911 the jaw, and nuts mounted on.' the iserewdon adjusting the tensionvofzthe spring, andligld ingthe screw in the required adjuetednposlition. f 'X 4. A band saw clamp 'comprisingiazbafee formed with spaced uprights, apli-ate movable. betweemthe uprights and .itonmedwith depending flanges pivoted to .theisaiduprights and .projecting forwardly .frqmzthebaseiand lil@ having a depending portion at its outer end, a jaw adapted to coact with the base and the uprights and flanges to clamp the saw, and formed with a flange in Contact With the loottom side of the forwardly projecting portion of the plate, a connection between the iiange and plate admitting of the jaw having a limited inward and outward movement, a screw mounted in the depending portion of the plate7 and a spring mounted upon the screw and adapted to exert a pressure upon the jaw.

In testimony whereof I afX my signature. l/VILFRED L. CARPENTER. [1.. 5.] 

